Simplify by combining like terms. 
Definitions:
Demand Curve
A graphical representation showing the relationship between the price of a good or service and the quantity demanded by consumers.
Income Effect
That part of an increase (decrease) in amount consumed that is the result of the consumer’s real income being expanded (contracted) by a reduction (rise) in the price of a good.
Candy Bars
Candy bars are confectionery items commonly consisting of a chocolate coating or shell filled with ingredients like nuts, caramel, or nougat.
Butter Consumption
Refers to the amount of butter used or eaten by individuals or within a specified community or demographic.
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